package org.bouncycastle.crypto.test;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.digests.SHA256Digest;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.SimpleTestResult;
import org.bouncycastle.util.test.Test;
import org.bouncycastle.util.test.TestResult;
/**
* standard vector test for SHA-256 from FIPS Draft 180-2.
*
* Note, the first two vectors are _not_ from the draft, the last three are.
*/
public class SHA256DigestTest
implements Test
{
static private String testVec1 = "";
static private String resVec1 = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855";
static private String testVec2 = "61";
static private String resVec2 = "ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb";
static private String testVec3 = "616263";
static private String resVec3 = "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad";
static private String testVec4 = "6162636462636465636465666465666765666768666768696768696a68696a6b696a6b6c6a6b6c6d6b6c6d6e6c6d6e6f6d6e6f706e6f7071";
static private String resVec4 = "248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1";
// 1 million 'a'
static private String testVec5 = "61616161616161616161";
static private String resVec5 = "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0";
public String getName()
{
return "SHA256";
}
public TestResult perform()
{
Digest digest = new SHA256Digest();
byte[] resBuf = new byte[digest.getDigestSize()];
String resStr;
//
// test 1
//
digest.doFinal(resBuf, 0);
resStr = new String(Hex.encode(resBuf));
if (!resVec1.equals(resStr))
{
return new SimpleTestResult(false,
"SHA-256 failing standard vector test 1"
+ System.getProperty("line.separator")
+ " expected: " + resVec1
+ System.getProperty("line.separator")
+ " got : " + resStr);
}
//
// test 2
//
byte[] bytes = Hex.decode(testVec2);
digest.update(bytes, 0, bytes.length);
digest.doFinal(resBuf, 0);
resStr = new String(Hex.encode(resBuf));
if (!resVec2.equals(resStr))
{
return new SimpleTestResult(false,
"SHA-256 failing standard vector test 2"
+ System.getProperty("line.separator")
+ " expected: " + resVec2
+ System.getProperty("line.separator")
+ " got : " + resStr);
}
//
// test 3
//
bytes = Hex.decode(testVec3);
digest.update(bytes, 0, bytes.length);
digest.doFinal(resBuf, 0);
resStr = new String(Hex.encode(resBuf));
if (!resVec3.equals(resStr))
{
return new SimpleTestResult(false,
"SHA-256 failing standard vector test 3"
+ System.getProperty("line.separator")
+ " expected: " + resVec3
+ System.getProperty("line.separator")
+ " got : " + resStr);
}
//
// test 4
//
bytes = Hex.decode(testVec4);
digest.update(bytes, 0, bytes.length);
digest.doFinal(resBuf, 0);
resStr = new String(Hex.encode(resBuf));
if (!resVec4.equals(resStr))
{
return new SimpleTestResult(false,
"SHA-256 failing standard vector test 4"
+ System.getProperty("line.separator")
+ " expected: " + resVec4
+ System.getProperty("line.separator")
+ " got : " + resStr);
}
//
// test 5
//
bytes = Hex.decode(testVec4);
digest.update(bytes, 0, bytes.length/2);
// clone the Digest
Digest d = new SHA256Digest((SHA256Digest)digest);
digest.update(bytes, bytes.length/2, bytes.length - bytes.length/2);
digest.doFinal(resBuf, 0);
resStr = new String(Hex.encode(resBuf));
if (!resVec4.equals(resStr))
{
return new SimpleTestResult(false,
"SHA256 failing standard vector test 5"
+ System.getProperty("line.separator")
+ " expected: " + resVec4
+ System.getProperty("line.separator")
+ " got : " + resStr);
}
d.update(bytes, bytes.length/2, bytes.length - bytes.length/2);
d.doFinal(resBuf, 0);
resStr = new String(Hex.encode(resBuf));
if (!resVec4.equals(resStr))
{
return new SimpleTestResult(false,
"SHA256 failing standard vector test 5"
+ System.getProperty("line.separator")
+ " expected: " + resVec4
+ System.getProperty("line.separator")
+ " got : " + resStr);
}
// test 6
bytes = Hex.decode(testVec5);
for ( int i = 0; i < 100000; i++ )
{
digest.update(bytes, 0, bytes.length);
}
digest.doFinal(resBuf, 0);
resStr = new String(Hex.encode(resBuf));
if (!resVec5.equals(resStr))
{
return new SimpleTestResult(false,
"SHA-256 failing standard vector test 5"
+ System.getProperty("line.separator")
+ " expected: " + resVec5
+ System.getProperty("line.separator")
+ " got : " + resStr);
}
return new SimpleTestResult(true, getName() + ": Okay");
}
public static void main(
String[] args)
{
SHA256DigestTest test = new SHA256DigestTest();
TestResult result = test.perform();
System.out.println(result);
}
}